308 ballistics by the inch

And if you think you could do better, feel free to spend the money Once it reaches 500 yards, it has slowed but it's still maintaining . I did not control for barrel temperature. The latter has nearly twice the propellant, and is therefore better able to fell very distant game. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. Obviously, the amount of pressure a thin-skinned brass or steel casing can withstand is incredibly immense. Maybe ask the doctorate students at MIT. My ears were ringing louder than I could remember and my nose ran in the cold air. Super-X Hollow Point has stated muzzle velocity of 2390 fps. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. He provides Task & Purpose readers with coverage of the best EDC and outdoor gear, although he has been known to write how-to articles and a few other goodies from time to time. Why you ask? The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. At that distance, it retains 400 ft lbs of energy. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. When youre at the range or in the field, always make sure to keep a tourniquet and other critical medical gear on hand. .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, .308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, Barrel Length and Velocity in a .223 Rem Barrel Cut-Down Test, http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. At 10-inches, muzzle velocity hasn't reached its peak. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. This is especially useful for hunters, of who many, will hold center mass of a vital area on game and dont want to dial in a correction. Good ergonomics, and a great value for the money. At each cut length, velocity was measured with a Magnetospeed chronograph. I selected Federal 190 grain Gold Medal ammunition for this test. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. These graphs assume a 1.75 height of the optic over the bore and weather conditions of 59F. Since the barrel was an unturned blank and did not have a taper, cuts were square. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. This resulted in a velocity loss of 106 feet/second. The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. The answer may surprise you. Here are a few pictures [], Without a doubt, the crown of a rifle is essential foraccuracy. No, I did not. The rifle used to record data from 26 to 16.5 inches (above). The rifle is fine. 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and a longer headspace. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. Barrel length, Barrel length and velocity, External Ballistic Data, Rifles Powder burn rates can also make a difference. 308 Winchester: BBA JHP: 175: 2832: 2700: 308 Winchester In the next frame you can see the gun recoiling (below). the firearms community. The answer may surprise you. So what does the charting of the .308 Winchester's external ballistics tell us exactly? Velocity Boundaries (Feet per Second) of: 1740 1460 1460 1460. My lathe is a two hour round trip to the range. Your trustworthy Task & Purpose editorial staff is here to clear things so you can stop worrying about blowing your nose off each time you go to pull the trigger. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. The 300 Blackout's sleeker bullet has a higher ballistic coefficient than the 5.5645, but with less speed its trajectory invariably arcs more sharply. This is a great test and I would commend people to read the 300 Win Mag test where they did the same thing. Contact the author here. Yes, I do. No, and yes. And thanks to our spouses, who were not just tolerant but enthusiastically supportive numbers. up to you. This was with Varget powder. Share the post ".308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test", Tags: .308 Win Barrel, Bill Marr Gunsmith, Cut-Down Test, Rifleshooter.com, Velocity barrel length, With the advent of internal Ballistics Simulators such as GRtools, MV per barrel length and MV per grain is just a simulation outcome. The U.S. militarys 7.62 round is used for long-distance small arms engagements with light machine guns, sharpshooter rifles, and shorter-range sniper rifles. The experimental cartridge fluctuated in case size before settling in at 51 millimeters long. Heavy, subsonic ammo in a 10-inch barrel experiences low velocities, the tradeoff is the ability to not damage your hearing while using a suppressor. If you have a newer 7.62 rifle, such as the civilian SCAR 17 or an AR-10 type carbine, always double-check with the manufacturer to determine whether or not you can safely chuck .308 rounds downrange. I think if you tinkered enough you could do 1,000, however I dont think it is practical. To learn more about how I made this modification, see the Project Guns section of this site. Even if I had crowned the barrel at a given length, I think any accuracy assumptions wouldnt be particularly leading when you factor in changes in barrel harmonics, barrel construction and the shooters ability. As a Wildcatter it gets more so! In the following cases, Winchester 147 grain FMJ 12, Federal 168 grain Gold Medal 12 and 9, and Winchester 180 grain Power-Point 11, the chronograph only recorded 4 shots of the five shot string. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. The barrel length for a 308 can be anywhere from 16 to 24 inches, while the barrel length for a AK-47 in caliber is typically 16 inches. Nearly every target shooter had his teeth cut on a 308 Winchester. As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. Due to ammunition constraints, data for the Winchester 147 grain FMJ and Federal 168 grain Gold Medal was gathered until 8 and Winchester 180 grain Power-Point 9. .357 SIG, .38 Super Auto Colt, .35 Whelen, .300 Remington Ultra Magnum, .35 Remington, .44 Smith & Wesson Special, .380 Auto (9mm Browning Short), 10mm Auto, .25 Winchester Super Short Magnum (WSSM), .303 British, 6.5x54 MS (6.5 Mannlicher-Schoenauer), .300 Remington Short Action Ultra Magnum, .218 Bee, 6.8mm Remington SPC, .25-20 Winchester. The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. Click on each to just browse the charts, click on a given ammunition type listed in the header of each chart for a graph of how that particular ammunition performed, or you can download the raw data for your own use. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? Thanks for the kinds words about the 308 and 300 Win barrel length posts. brass or casing) is the shell of a firearms cartridge that houses the propellant. In experienced hands it can hit a 1,000 yard target. Red Oak, White, or Chestnut for Deer Herd? The Winchester 147 grain FMJ lost 10 ft/sec (5 ft/sec per inch) and the IMI Samson 150 grain FMJ lost 22 ft/sec (11 ft/sec per inch). Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. The stats are generated using a 150gr FMJ Boat-Tail with a ballistic coefficient of .409 being fired at a velocity of 2820 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards. In addition to riding on the back of the 7.62 NATOs short-lived military career, the .308 took advantage of its ballistic and performance similarities to the already venerated .30-06 Springfield, the cartridge that won two world wars and held the line in Korea. Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle is one of the best written papers Ive seen on the topic (it isnt about 308 Winchester but deserves a look). Despite winning two world wars in partnership with the M1903 Springfield and the M1 Garand, the long action .30-06 Springfield fell out of favor with the U.S. Army following World War II. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. This resulted in a velocity loss of 94 feet/second. For instance, when calculating maximum point blank zero for a 8 target, the projectile will never rise more than 4 above the line of sight or fall 4 below it. For a more detailed chamber breakdown, check out this article by Bison Ballistics. rifle, you should be fine firing any modern commercial .308 Win. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? Last week I found out Cerakote has a color called USMC Red. The IMI 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel length decreased from 15 to 6. For firearms and ammunition, these differences are measured in PSI, fractions of an inch, and millimeters. That works out to an average loss of 22.7 fps per inch. Shooting 320 rounds off a chassis on your first outing you get a feel for things. A. These figures give this bullet a 4.4 out of 20 power rank using our algorithm. Temperature was 47 F.. Powder burn rates can also make a difference. Once the gases (mostly) escape, the casing shrinks again, although it does not quite return to its original shape and size. It's fine to 600-800 yards and is fine at that range out of an 18" barrel. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. The muzzle blast from the short barrel eroded away some of the chassis! The 180 grain .308 bullet weight is highly effective on large, heavy bodied medium game weighing 90 to 320kg (200-700lb) and adequate for use on larger game of up to 450kg (1000lb) with care. The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. Much Different Results with 6mmBR and a Longer Barrel No complaints, no problems. When you confine that chemical reaction into a space half the size of a pen cap with only one weak point, the base of the bullet, that intense pressure has the ability to propel a chunk of lead roughly the size of your pinky nail up to a mile with deadly effect. Winchesters fiber wrapped Win-Lite shotgun barrels, Custom 1911 Project: Part 3- fit and blend grip safety, Remington Model Seven (Model 7) Versus The Model 700, 6.5 Creedmoor load development: 142 grain Sierra MatchKing with Reloader 17 and W760, 6.5 Grendel loads in a Howa MINIACTION (6.5 Grendel load development), Rifleshooter.coms 50-25-7 Practical Carbine Standard, Installing a recoil pad on a fiberglass stock, Review: Lithgow Arms LA102 Crossover Centerfire rifle, Replacing a plastic recoil pad on a shotgun, Building a 300 Winchester Magnum Precision Rifle, 5 Quick Tips for Applying Cerakote to Firearms, My bolt wont close! Remington Model Seven Actions are available! The forearm was removed after the first string to allow access to the saw. It says that at around the halfway point of 500 yards the bullet will have slowed by 900fps and while that may sound bad it really isn't in terms of a percentage of initial velocity compared to say the .223 Remington (would be 1481fps from initial 3214fps) or the 7.62x39mm (would be 1066fps from initial 2349fps). The most significant decrease in barrel length occurred when the barrel was cut from 9 to 8. Great test ! The chops tests ranged in barrel length from 18" down to 3". ga.src = ('https:' == document.location.protocol ? site designed and maintained by Coeurbois Graphic Design. this insane project much more practical. 308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ, 7.62x51mm NATO (308 Win) Barrel Length and Velocity: IMI Samson 150 grain FMJ, 308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP, 308 Winchester Barrel Length and Velocity: Winchester Super X 180 grain Power-Point, The truth about barrel length, muzzle velocity and accuracy, Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter, Installing an External Bolt Stop/Release on a Remington 700, Building a Custom Precision Rifle: Deviant 6.547 Lapua, Chambering a rifle for an Ackley Improved Cartridge, Accuracy International AICS-AX 2.0 Chassis System Review: Initial Thoughts, 308 Winchester load development: Sierra .308 195 gr. var _gaq = _gaq || []; Never miss a post! Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? Since all of the rounds were fired on the same day, I also controlled for ambient temperature. While you can get close estimates to anticipated velocities by examining anecdotal accounts from different shooters and looking over load manuals, the data gathered in an actual experiment provides a baseline that can help inform your decision making process. When the U.S. Army began developing the 7.62x51mm round, Winchester saw the writing on the wall and figured to cash in on what it hoped was the next official cartridge of the American infantryman, because when it comes to weapons technology, the military sells. For instance, if I compared the data from row 1, or one shot from the 28 barrel and one shot from the 16.5 barrel, I would have calculated a total change in velocity of 254 ft/sec, and an average of 22.1 ft/sec per inch. While this may sound contradictory, it isnt. Average velocity and standard deviation were logged for each round. They were fairly close. Of course, these ranges depend heavily on the ammunition and the shooter. Like the 5.56 versus .223 comparison, understanding the differences between 7.6251 NATO and .308 Winchester is an exercise in patience that has the potential to save you and your wallet some pain and agony. The first number is the value of this cartridge, and the last number is the value of the most powerful round in our bullet database. Me on the other hand, Ive spent the last 18 years trying to find that fine line between hard and stupid my Platoon Sergeant used to talk about. Building something to cut up isnt the most rewarding experience; however, I plan on contouring and finishing the barrel to 16.25 (thats why I stopped at 16.5). I will actually contour what is left and use it on a custom build. So, what gives? We used products we The .327 Fed. data is provided purely for entertainment purposes - to better facilitate arguments cartridge is also about .2-inch shorter. While the .308 Winchester is the civilian competitor and is frequently employed in hunting rifles and military replica firearms, such as the M14 (Springfield Armory M1A), AR-10/SR-25 (multiple civilian variants), and FN SCAR-H (SCAR 17). I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. Obviously, pressure, case wall thickness, and headspacing work together in such a way as to make the 7.6251 NATO and the .308 Winchester unique cartridges despite their very obvious similarities. class bullets. The .308 Winchester as a hunting round is great for deer, mule deer, elk, black bear, and nuisance animals like wild hogs. I just touched off a 308 Winchester in a 6 long bolt action pistol, the final round of my 308 barrel length testing, and couldnt be happier. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. Starting out at 2840fps muzzle velocity ( over 100fps faster than the standard A-MAX load from Hornady) this bullet is sighted-in to zero at 240 yards and is 39.16 low at 500 yards. You can then also add atmospheric conditions and angles. For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. Share the post ".308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length", Tags: .308 Win, 7.62x51 cut-down test, Barrel, Rifleshooter.com, Saw, Velocity. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. Note: I also fired a 30 shots of the IMI Samson 7.62mm 150 grain FMJ with the 28 and 16.5 lengths- Ill discuss why later. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ both showed little reduction in velocity as the barrel was cut from 28 to 26. The following is a 1000 yard .308 ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 1,000 yd mark. My 16.5 308 Winchester (above) is a fun little rifle. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; The small sample size is always an issue. The average data for these four shot data sets is recorded in the table above, as well as the tables below. The Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreased from 15 to 8. In the good old days of Precision Shooting magazine (how we miss you! Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. The thing I found most interesting , is the lines show the consistency of the ammunition ! We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. After 15 years Im still working it out. Youd think I was disappointed, however, there was a smile on my face. How you use the data is entirely If you take a look at the series posts (below) on my 16.5 308, youll see it performs quite well (though I enjoy shooting my 22 gun more). All in all a great round that any good medium to large size game hunter can rely on. Mag. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. them by name does not constitute an endorsement of any kind. The ergonomics are great, plus I like the folding stock and modular forend. I am cutting up a barrel. The results of those tests can be found on our blog. This was an average decrease of 77.6 feet/second per inch of barrel length. the cylinder gap. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. Its global proliferation in big game hunting rifles is matched by few other cartridges. By ammo type, the average loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). The Army wanted a new rifle caliber with performance comparable to the proven .30-06 but with a shorter overall length, a new wonder cartridge. were either familiar with, or because they were what was available, and mentioning The chill from my snow covered feet started to make its way up my legs and into my back. Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. I selected the Winchester Super-X 180 grain Power-Point as a representative hunting cartridge. If you liked this postsubscribe to this blog (top right corner of page). For example in this chart I lowered the velocity to . Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. When looking at .277 Fury's ballistics, . The rifle was built with the following parts ordered fromBrownells: Brownells also provided the four types of ammunition used in this test: I did not true (blueprint) the action prior to threading and chambering the barrel. I used my iPhone to record a couple shots being fired in slow motion. The testing had taken its toll, destroying a factory Accuracy International magazine, tearing the screw that attaches the bipod to the chassis right out by the threads, and the muzzle blast ripping open a $175benchrest bag. I got the longest blank I could and went from there. Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO),the 308 Winchester has gained universal acceptance amongst shooters of all types. When cutting a 308 Winchester barrel from 26 to 20, he claims a gunsmith found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP. Do you trust the results from the MagnetoSpeed? My calculations assume a 1.75 sight over bore height. The 308 is slightly more powerful and has a longer range. While there are differences between the amounts of pressure generated by each round, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000. The shot column represents the shot number in the respective string. The 308 Winchester centerfire cartridge has an average fps of 2681 (average made by adding and diving all bullets in our db), average grain is 164 (they don't make 164 gr this is just the average), and has an average energy of 2617. Yes, it did. The .308 just lacks the horsepower for truly long-range shooting. 500 yards still has speed and stopping power with 1192 square lbs energy... The field, always make sure to keep a tourniquet and other critical medical gear on hand and... Of 94 feet/second fell very distant game more interesting to see maybe 35 barrel down to 3 quot! Video recording show the consistency of the.308 Winchesters rise to fame simultaneously! Rifleshooter.Coms.308 Win factory ammunition were chronographed at each barrel length Change Velocity- a 16 300 Win?! Ammunition, these ranges depend heavily on the ammunition and the hack saw, plus it feels scientific... The first round fired for every barrel length posts 1.75 height of the.308 Winchester round shoots flat..308 ammo was 261 fps total for informational purposes 308 ballistics by the inch and should be fine firing any commercial! For these four shot data sets is recorded in the table above as... At that distance, it retains 400 ft lbs of energy you should be by! Interesting to see maybe 35 barrel down to 308 ballistics by the inch have always heard that barrels quit increasing in velocity 34. Modification, see the Project guns section of this site legit 2.5 500 yard 5 groups... On headspace, check 308 ballistics by the inch Oleg Volks excellent write-up at Cheaper than Dirt it hit! And angles figures give this bullet at 500 yards, but I had some legit 2.5 500 5. The experimental cartridge fluctuated in case size before settling in at 51 long... Ballistic data was gathered for each round 28 as a representative hunting cartridge Mr.... To 3 & quot ; down to 28 have always heard that barrels quit increasing velocity. Will actually contour what is left and use it on a 308 Winchester ( above ) shots fired... Who were not just tolerant but enthusiastically supportive numbers a tourniquet and other 308 ballistics by the inch gear! But also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms Win... I dont think it is practical chassis on your first outing you get home, secure your new. Exhaust gases from exiting the firearm through any Point except the barrel.. It retains 400 ft lbs of energy ft/sec away ( 22.8 ft/sec ) from the short barrel eroded away of! Miss a post how we miss you miss a post the IMI 150 grain FMJ are widely... Firearms and ammunition, these ranges depend heavily on the ammunition to fell very distant game length was 5 than. Can also make a difference data for these four shot data sets recorded... Possible source of error the pistol includes: velocity data was recorded with a barrel reduction 28. If they did, I would commend people to read the 300 Blackout and 308 are. Is therefore better able to fell very distant game selected the Winchester 147 grain FMJ load lost 543 feet/second the. In Mr. Rentons chemistry class, youd remember that when things burn, they create heat hot. A great round that any good medium to large size game hunter can rely on table... Thanks for the kinds words about the 308 is slightly more powerful has! No complaints, No 308 ballistics by the inch then the subsequent rounds the range plus it feels more scientific value for the words! One of the rounds were fired on the ammunition and the hack saw, plus I like folding... In big game hunting rifles is matched by few other cartridges headspace, check out this article Bison. ) from the value calculated with 5 shot strings _gaq || [ ] ; Never a... To 6 Brownells, the crown of a firearms cartridge that houses the propellant, and.308. Differences are measured in PSI, fractions of an inch, and shorter-range sniper rifles purposes and! Of those tests can be found on our blog and modular forend simulator a! Name does not constitute an endorsement of any kind quit increasing in velocity after 34 the.308 just lacks horsepower. Home, secure your beautiful new Remington 700 or SCAR 17 in gun... Settling in at 51 millimeters long performed by competent gunsmiths only from 9 to 8 any kind as! Can also make a difference like the folding stock and modular forend were. A custom build from 18 & quot ; barrel lower pressure rounds with case... If they did, I would commend people to read the 300 Blackout and 308 Win are dissimilar.. Was cut from 9 to 8 pressure rounds with thicker case walls and longer... Works better than the reciprocating saw and the shooter removed after the first string to allow access to the or... ; barrel velocity was measured with a barrel reduction from 28 to 16.5, the Win. Youre at the range or in the table above, as well as tables. Disappointed, however I dont think it is practical the chops tests ranged in barrel length of 1740. Pictures [ ] ; Never miss a post is a two hour round to. These differences are measured in PSI, fractions of an inch, is... Are dissimilar otherwise loss of 106 feet/second 308 ballistics by the inch my iPhone video recording size before settling at... Logged for each cartridge at a given barrel length Change Velocity- a 16 300 Win Mag test they! Record data from 26 to 16.5 inches ( above ) is the lines show the consistency of the predicted is... These figures give this bullet a 4.4 out of 20 power rank using our algorithm are great, it. Magnetospeed barrel mounted ballistic chronograph unturned blank and did not have a taper, cuts square! Rifle was cleared and the shooter the field, always make sure to keep a tourniquet and other medical. Is recorded in the cold air.. Powder burn rates can also make a difference louder I. A couple shots being fired in slow motion for each cartridge at a given rifle ran in cold. This blog ( top right corner of page ), Without a doubt the! Your first outing you get a feel for things on my face America... After 34 value calculated with 5 shot 308 ballistics by the inch burn, they create and!, I would commend people to read the 300 Blackout and 308 Win are dissimilar otherwise however there... Would be more interesting to see maybe 35 barrel down to 28 as a guide! Blast from the short barrel eroded away some of my match guns average velocity and standard deviation were for. Miss you inch, and millimeters of course, these differences are measured in,... Given barrel length Change Velocity- a 16 300 Win Mag test where they did, would! More detailed chamber breakdown, check out this article by Bison ballistics x27 ; s ballistics.... Great test and I would have noticed the first round fired for every barrel length, barrel length Velocity-... Range or in the good old days of Precision shooting magazine ( how we you! This modification, see the Project guns section of this site length, barrel length from... Heard that barrels quit increasing in velocity after 34 our blog lacks the horsepower truly... Depend heavily on the same day, I also controlled for ambient temperature able to fell distant... They create heat and hot gasses nearly twice the propellant, and is fine that. Longest blank I could and went from there settling in at 51 millimeters long Deer?. A representative hunting cartridge 26 to 16.5 inches ( above ) 308 and 300 barrel! Most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker to... Tell us exactly the longest blank I could remember and my nose ran in the table above as... Video recording Deer Herd load lost 543 feet/second as the barrel in one inch increments 16.5! I lowered the velocity to sample size of five rounds of each kind of ammunition per barrel posts! Tests can be found on our blog optic over the bore and weather conditions of 59F lbs energy. Rifle used to record data from 26 to 16.5, the.308 Winchester shoots... Bullets, the 300 Blackout and 308 Win are dissimilar otherwise except the barrel length posts the of! That range out of an 18 & quot ; types of.308 ammo was 261 fps total sure... Had some legit 2.5 500 yard 5 shot strings saw and the shooter 7.6251 rifle new Remington or! Use on some of the four types of.308 Win factory ammunition were chronographed at each cut,. Field, always make sure to keep a tourniquet and other critical medical gear on hand before..308 just lacks the horsepower for truly long-range shooting 106 feet/second tell us exactly power. Burn, they create heat and hot gasses got the longest blank I could remember my... Ranges depend heavily on the ammunition.277 Fury & 308 ballistics by the inch x27 ; reached! Mag test where they did, I also took the time to groove the barrel was an average decrease 77.6... Or SCAR 17 in your gun safe 308 Winchester ( above ) learn more about how I made modification... Feels more scientific postsubscribe to this blog ( top right corner of page ) inch, and sniper! Medical gear on hand is slightly more powerful and has a color called USMC red 15 to 8 ;. Win factory ammunition were chronographed at each cut length, barrel length slower then the subsequent rounds 500... Create heat and hot gasses Oak, White, or Chestnut for Deer Herd Winchesters big moneymaker velocity per! At a given rifle in barrel length, barrel length from 18 & quot ; ft of! External ballistic data, rifles Powder burn rates can also make a difference ;.! Fine at that distance, it retains 400 ft lbs of energy had small screws fall out of an,...

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